Ballpoint pen



FIG. 1 is a perspective view of the front, top and left side of a ballpoint pen showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a front view of the first embodiment of the ballpoint pen thereof, shown without the cap;

FIG. 8 is a bottom view of the first embodiment of the ballpoint pen thereof, shown without the cap;

FIG. 9 is a front view of the second embodiment of the ballpoint pen thereof, shown without the cap;

FIG. 10 is a bottom view of the second embodiment of the ballpoint pen thereof, shown without the cap;

FIG. 11 is an enlarged left side view of FIG. 5 thereof; and,

FIG. 12 is an enlarged right side view of FIG. 6 thereof. 

The ornamental design for a ballpoint pen, as shown and described. 